red outlet in garage

Both the posts above are correct.

In a hospital, in patient care rooms, all switches and receptacles that are supplied by the life-safety system are required to be red. This is not in the NEC, it's a hospital certification requirement.

A lot of commercial/industrial buildings I work on use red for switches and receptacles that are supplied by a generator when utility power is out.

red outlet in garage

Is it wired in any unusual way, for example is not live unless an extension cord is pressed onto a set of prongs (male receptacle; inlet) in an outlet box somewhere else in the house?

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